Brush holder for brush-making machines



June 13, 1933. 1 B. TERHUNE 1,913,863

BRUSH HOLDER FOR BRUSH MAKING MACHINES Filed Feb. 11. 1929 4Sheets-Sheet l INVENTOR Z Zm Md Mm ATTORNEYS June 13, 1933.

4. 544 L a. J M 11M Filed Feb. 11. 1929 HOLDER FOR BRUSH MAKING MACHINES4 Sheets-Sheet 2 June 13, 1933. L. B. TERHUNE BRUSH HOLDER FOR BRUSHMAKING MACHINES Filed Feb. 11, 1929 4 Sheets-Sheet 4 INVENTOR QTMLA BY mATTORNEY Patented June 13, 1933 UNITED STATES PATENT" OFFICE LEONARD B.TERHUN'E, OI NEWARK, NEW JERSEY, ABBIGHOB TO D'U ION! VISGOLOID COMPANY,OF WILMINGTON, DELAWARE, A CORPORATION OI DELAWARE BRUSH HOLDER FOBBRUSH-[LING IAGHIHES Application filed February 11, 1928. Serial Io.388,978.

My invention relates to brush-making machines desi ned to insert tuftsof brlstles into brush blan s, and relates more particularly to themechanism for holding and moving the brush blanks for that purpose.

The object of my invention is to provide a brush holder mechanismadapted to hold in position, in succession, a series of brush blanks ofany desired type for they accurate drilling of the brush blanks and1nsert1on of the bristles in tufts into the same. The object of myinvention particularly 1s so to construct the brush holder mechanlsm asto enable a given speed of operation to be mamtained. Previously, brushholders have been so arranged as to require the movement of the entireholder of a series of brush blanks for each movement of a particularbrush blank while being re-positioned for drilling and filling of thesuccessive holes in each lank. Because of the tremendous inert1a -of theholder and attached parts, including the brush blanks, there has been,accordlngly, a very decided limitation in the speed that could beattained. Also, because of the extremely rapid succession of movementsof i the brush holder there was a limit on the speed with which brushblanks could be fed to the holder. In accordance with my 1nvention I soarrange the holder that while a single given blank is being drilled andfilled this blank alone is moved from one hole to another thereof for agiven series of holes, while the remainder of the holders remainsstationary until a new series of holes 1s to be drilled or filled, or anew brush blank is to be brought into position for drilling or filling.This enables the movement of the particular brush blank to be speeded upfar beyond what was previously posslble and also enables the brushblanks to be fed continuously to the holder much more rapidly thanhitherto was possible, and enables the feeding of the blanks to becarried out mechanically and automatically. In order to further savetime and enable greater speeds of operation to be attained, my mechanismis so constructed as to permit repalrs or adjustments to various otherparts of the machine while the particular part of the ma chinecontaining the blank being drilled or filled is in operation, withoutshutting down the latter entirely. This constitutes a'distinct source oftime economy as the periodic shutting down of the whole machine isobviated. his construction, furthermore, permlts a much more accuratepositioning of the brush blank while it is being drilled and filled,inasmuch as only the immediate arts for supporting the particular brushlank need be ositioned or adjusted prior to drilling or lling. For thesame reason it becomes posslble, therefore, in my machine to repeatedlydrill the same hole to different depths or to accurately ream a holethat has already been drilled, when the brush blank is moved tosuccessive positions for successive drilling or reaming. Another objectis to move the brush blank forward to the nozzle by a pin which at thesame time centers the brush blank. Again, this entire series ofoperations is rendered feasible by locating the brush blanks on adisk-holder for individual radial movement thereon, devices beingprovided for bringing the individual hole to be drilled or filledaccurately into its proper position, notwithstanding the relativepositions of the lines of holes 1n a particular blank, which lines ofholes may be parallel, curved or convergent, and notwithstanding theradial movement of the blank as a whole, on a single radial line passingthrough the center of the blank.

My apparatus is designed for use with a stationary drill of any desiredtype, and a stationary filling nozzle, such, for example, as is shown inthe patent to Gene upon Apparatus for inserting and fixing the bristlesof brushes, No. 378,130, granted February 21, 1888.

While my invention is capable of embodiment in many different forms, byway of of my invention in the accompanying drawings, in which- Fig. 1'is a front elevation showing the brush holder;

Fig. 2 is a vertical section through the same;

.illustration I have shown only certain forms Fig. 3 is a diagrammaticview of the cycles of operation on a disk-holder;

Fig. 4 is an elevation of a spring plunger used as a pawl; and

Fig. 5 is a rear view of the brush holder mechanism.

In the drawings, 1 have shown a main shaft 1 carried in a frame 2, whichshaft has con nected thereto means for driving the same at any desiredspeed from any suitable source of power. Surrounding, the shaft 1 thereis provided an annular disk-shaped brush blank holder 5 adapted toreceive a, succession of brush blanks 6, as, for example, tooth brushblanks, which may be continuously fed thereto by hand, or otherwise, atthe periphery of the holder at the point marked 7 in Fig. 3, thearrangement being such that the completed brushes, after drilling andfilling, are continually removed from the holder at the point 8immediately in advance of the point 7 referred to. As will he noted fromFig. 1, each of the brush blanks 6 occupies a different position withregard to the center of the disk 5, each being located on its ownindividual radius thereon. Each of the brush blanks 6 is supported inthe holder 5 upon a movable carriage 9 which is provided withprojections 9a, 9b to fit around the ends of and tightly hold the brushblank in place while being operated on for drilling or filling. Thecarriage 9 is supported by two links 10 and 11, by means of a ball andsocket joint 12, and pivot 13 allowing a certain amount of lateral playbetween the lever 11 and said pivot 13 to secure the accuratepositioning of the carriage 9. The positioning of the carriage 9 isaccomplished by means of a pin 14 pro ecting from the frame, and havinga point 15 with a very acute angle at the point of the pin 14 toaccurately fit within each one of a series of countersinks 16 ofsubstantially the same shape as the face of the brush blank 6, in therear face of the carriage 9, one of said countersinks 16 being providedfor each of the holes to be drilled and filled in the brush blank 6.This pin 14 is normally held in retracted position by a spring 15a,cooperating with a shoulder 15?) thereon, and the pin is moved forwardlyby a plunger 150 thereon, having an interposed spring 1503, which ismoved by an adjusting pin 15e contacting with said plunger. It is bythis means that the brush holder 9 is pushed forward to the drill 15f orinstead the lilling nozzle. A spring-pressed plunger 17 having anobtusely shaped point 18, fits also in a similar series of countersinks19 for roughly holding the carriage in its position between theintervals of accurate adjustment by the point 15 and while the blank onthe carriage is not being operated on for drilling and filling. Saidplunger 17 is supported in a sleeve 20 forming a part of a sliding frame23 to which levers 10 and 11 are secured by pivots 21 and '22, whichframe is carried on a. pin 24 projecting forwardly from the blank holder5. A spring retracted guiding rod 25, furthermore, is provided with aconnecting pin 26, secured in an opening 27 in the sliding holder 20 forguiding and supportingthe same. A spring 27a provides the plunger 17with a light forward pressure at all times. The carriage 9 is broughtinto its initial position for the drilling or filling of the first holethereof by means of a cam 28 which is secured to the hub of a countershaft 28a, said cam 28 having a cam surface 29 for cooperating with aroller 30 011 an arm-31 carried by a sleeve .32 which has a flange 33engaging with yokes34 on bell crank levers 35, which are pivoted to themain frame and carry yokes 36 having releasable engagement with rollers37 attached to the inner end of the carriage 9. The releasable movementreferred to is due to the open yokes 36 in which the rollers 37 arereceived; This permits the disengagement of those of the blanks notbeing operated upon-at any time so as to contribute to the maintenanceof and the continued operation of the machine. It will be noted that aspring 38 located between the inner end of the sleeve 32 and the frame 1keeps the roller 30 in contact with the cam 28. This cam 28 is moved bya ratchet wheel 39 on the shaft 28a, which in turn is moved by a pawl 40on a lever arm 41, having a loose connection, by a link 42 to areciprocating frame 43 supported by a sleeve 44 on the shaft 1 inside ofthe sleeve 32. A cam 45 on the main shaft 1 contacts with a roller 46 onthe reciprocating frame 43- so as to move the same at the properintervals, thereby rotating the cam 28 and moving the frame 43, whichcarried the adjusting screws 15c so as to move the points 14 forwardlyand in turn bring the brush holders 9 up to the drills and nozzles. Thisreciprocating frame 43 also has arms 47 for insuring the retraction ofthe guiding rods 25 to their initial position, thus definitelypositioning the brush blank holders 9 initially.

In order to rotate the disk-shaped holder 5 from one row of holes toanother, and from one blank to another, the latter carries a circularrack 48, adapted to slidably interlock with the main frame 2, havingteeth 49 corresponding to the movements from one row of holes to anotherand from one blank to another. As shown in Fig. 4, a spring pressedplunger 50 is provided for moving the rack 48 which is carried on a bellcrank lever 51 supported on a pivot 52 located on the main frame 2, theother end of which lever has a projection 53 adapted to be operated bytwo long projections 54 and 55 and four short projections 56, 57, 58 and59 on the ratchet wheel 39.

As will be seen from Fig. 3,.the cycle of operations may be arranged ina number of different ways. For example, they may be ar-.

eration at the top of the point 60 and a filling operation at 61. Ifdesired, however, these operations may be added to by having anadditional filling operation at the point 62 and an additional fillingoperation at the point 63, additional loading and unloading operationsbeing provided at points 64 and 65,.respectively. Again, if desired,successive drilling operations may be provided for in the same holes foreach filling operation, and for this purpose additional drillingoperations may be provided at points 66 and 67 In addition,

there may be introduced reaming operations 68 and 69 for the holes thathave been already drilled and prior to filling. For these additionaloperations additional stationary drilling, filling and reaming deviceswould be provided at the points indicated and the mechanism for shiftingthe particular blank from hole to hole therein already described for themovement of the particular blank, may be duplicated opposite each of thedrilling, reaming and filling points referred to.

While I have described my invention above in detail I wish it to beunderstood that many changes may be made therein without departing fromthe spirit of the same.

I claim:

1. A brush holder mechanism comprising a holder for a series of brushblanks and movable means for shifting the position of an individualbrush blank for successive drilling or filling thereof without themovement of the holder and moving the holder in the same direction forthe successive brush blanks to bring each successive brush blank insubstantially one plane and movable means for shifting the position ofan individual brush blank for successive drilling or filling thereofwithout the movement of the holder and moving the holder in the samedirection 3. A brush holder mechanism comprising a rotatable holder fora series of brush blanks and means for supporting and moving theindividual brush blanks radially thereon with regard to the axis of therotatable holder for successive drilling and filling thereof wit out themovement of the holder.

4. A brush holder mechanism comprising a rotatable holder for supportinga series of brush blanks in substantially one plane and means forsupporting and moving the individual brush'blanks radially thereon withregard to the axis of the rotatable holder for successive drilling andfilling thereof without the movement of the holder.

5. A brush holder mechanism comprising a rotatable holder for a seriesof brush blanks and means for supporting and moving the individual brushblanks radially thereon with regard to the axis of the rotatable holderfor successive drilling and filling thereof, said blanks being adaptedto have a plurality of series of holes to be drilled and filled while inthe holder, and means for accurately positioning the individual blanksfor successive drilling and filling so that'each of the series of holeswill be drilled and filled on a single radius of the holder.

6. A brush holder mechanism comprising a rotatable holder for a seriesof brush blanks .and means for supporting and moving the individualbrush blanks radially thereon with regard to the axis of the rotatableholder for successive drilling and filling thereof, said blanks beingadapted to have a plurality of series of holes to be drilled and filledwhile in the holder, and means for accurately positioning the individualblanks for successive drilling and filling so that each of the series ofholes will be drilled and filled on a single radius of the holder,including a preliminary centering device and a secondary accuratecentering device capable of displacing the position of the firstcentering device.

7. A brush holder mechanism comprising a holder for a series of brushblanks, movable means for shifting the position of an individual brushblank for successive drilling and filling thereof without the movementof the.

holder, and means for bringing the brush blanks in succession into theirinitial position for drilling and filling of the first holes to bedrilled and filled thereon, respectively, the first-mentioned meansbeing so constructed as to be disconnectable from its shifter at a timewhen the drilling and filling is not taking place in the operation ofthe individual holder.

8. A brush holder mechanism compr sing a holder for a series of brushblanks and movable means for shifting the position of an individualbrush blank forwardly towards a stationary revolving drill and astationary nozzle for successive drilling and filling thereof Withoutthe movement of the holder.

9. A brush holder mechanism comprising means for holding a series ofbrush blanks and means for moving one out of a group of the series ofbrush blanks with regard to the holder itself during the drilling andfill: ing of the successive holes therein.

10. A brush holder mechanism comprising means for holding a series ofbrush blanks and means for moving one out of a group of the series ofbrush blanks with regard to the holder itself during the drilling andfilling of the successive holes therein, said series being'comprised ofa plurality of such groups and means for simultaneously drilling andsimultaneously filling one black of each of said groups respectivelysimultaneously.

11. In combination, a brush blank holder and means for moving the sameforwardly for carrying out an operation on the blank, including a pinadapted for both the centering of the blank for said operation andmoving the same forwardly for effecting the operation.

12. In combination, a brush blank holder and means for moving the sameforwardly for drilling the blank, including a pin adapted for both thecentering of the blank for said drilling and moving the same forwardlyfor effecting the drilling.

13. In combination, a holder for carrying a series of brush blanks insubstantially one plane, a brush blank supporting device thereon andmeans for moving the supporting device forwardly for carrying out anoperation on the blank, including a pin adapted for both the centeringof the blank for said operation and adapted for moving the same for-,wardly for effecting the operation.

14. In combination, a holder for carrying a series of brush blanks insubstantially one plane, a brush blank supporting device thereon andmeans for moving the supporting device forwardly for drilling the blank,including a pin adapted for both the centering ing of the blank for saiddrilling and adapted for moving the same forwardly for effecting thedrilling.

15. In combination, a holder for carrying a series of brush blanks insubstantially one plane, a brush blank supporting device thereon andmeans for moving the supporting device forwardly for carrying out anoperation on the blank, including a pin adapted for both the centeringof the blank for said operation and adapted for moving the sameforwardly for effecting the operation, the construction being adapted topermit the individual blank to be moved forwardly independently of themovement of the holder for the series of brush blanks.

16. In combination, a holder for carrying a series of brush blanks insubstantially one plane, a brush blank supporting device thereon andmeans for moving the supporting device forwardly for drilling the blank,including a pin adapted for both the centering of the blank for saiddrilling and adapted for moving the same forwardly for effecting thedrilling, the construction being adapted to permit the individual blankto be moved forwardly independently of the movement of the holder forthe series of brush blanks.

In testimony that I claim the foregoing, I have hereunto set my handthis 29th day of January, 1929.

LEONARD B. TERHUNE.

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